ISO 7049 Pan Head Tapping Screws

Streamline your assembly with Xiaoguo® ISO 7049 pan head tapping screws. No pre-tapping required for faster, reliable fastening. Manufactured from high-grade Carbon Steel & Stainless Steel 304 to withstand tough environments. Buy direct from the manufacturer to lock in the competitive factory price. Inquire now for technical catalog and instant quotes!

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Product Description

ISO 7049 Pan Head Tapping Screws from Xiaoguo® supplier deliver full-lifecycle technical support beyond standard quality control, helping buyers resolve all selection, pre-production testing and on-site installation challenges. Backed by three core material options—carbon steel, stainless steel and case hardened steel—these ISO-standard pan head tapping screws are tailored for dry indoor, humid outdoor, coastal corrosive and high-torque frequent assembly scenarios.

In addition to the standard quality assurance, we place greater emphasis on providing you with timely and effective support for the ISO 7049 pan head tapping screws in actual use.

1.Selection and Sample Support

Which size should I choose?

You can provide the basic parameters (such as thickness, material, etc.), and we will recommend suitable screws for you.

What should I do if the installation is not proper?

We will send you samples for free so that you can use them for prenatal testing.

2.Problems encountered during installation

Excessive torque during installation

Adjust the size of the bottom hole and check the hardness of the ISO 7049 pan head tapping screws②The screws are prone to loosening.

Check the size of the bottom hole and verify whether the screws match the base material.

Cross-slot slipping

Use the appropriate type of screwdriver.

The surface of the screw is rusty.

Check the storage environment; Upgrade the surface treatment and choose Dacromet. Change to stainless steel material

ISO 7049 Pan Head Tapping Screws

3.Common materials

Based on the usage environment, strength requirements and corrosion resistance level of the ISO 7049 pan head tapping screws, the following three types of materials are mainly selected: carbon steel, stainless steel and surface-hardened steel.

Carbon Steel

Anti-rust treatment must be carried out. Common methods include galvanization (blue-white/yellow zinc), phosphating, blackening, and Dacromet coating.

The applicable scenario is an indoor dry environment, involving connections with ordinary metal sheets, plastic parts and wood.

Stainless Steel

The appearance is usually in its natural color, and it can also be polished by electrolysis.

The applicable scenarios include outdoor, humid, coastal, chemical, and food equipment.

Case Hardened Steel

The feature is that the surface is hard and wear-resistant.

The applicable scenarios involve frequent screwing operations or connections that require high torque.

ISO 7049 Pan Head Tapping Screws

Mon	ST2.2	ST2.9	ST3.5	ST4.2	ST4.8	ST5.5	ST6.3	ST8	ST9.5
P	0.8	1.1	1.3	1.4	1.6	1.8	1.8	2.1	2.1
a max	0.8	1.1	1.3	1.4	1.6	1.8	1.8	2.1	2.1
da max	2.8	3.5	4.1	4.9	5.6	6.3	7.3	9.2	10.7
dk max	4	5.6	7	8	9.5	11	12	16	20
dk min	3.7	5.3	6.64	7.64	9.14	10.57	11.57	15.57	19.48
k max	1.6	2.4	2.6	3.1	3.7	4	4.6	6	7.5
k min	1.4	2.15	2.35	2.8	3.4	3.7	4.3	5.6	7.1
r min	0.1	0.1	0.1	0.2	0.2	0.25	0.25	0.4	0.4
No.	0	1	2	2	2	3	3	4	4
M	1.9	3	3.9	4.4	4.9	6.4	6.9	9	10.1
t min	0.85	1.4	1.4	1.9	2.4	2.6	3.1	4.15	5.2
t max	1.2	1.8	1.9	2.4	2.9	3.1	3.6	4.7	5.8
d1 max	1.63	2.18	2.64	3.1	3.58	4.17	4.88	6.2	7.85
d1 min	1.52	2.08	2.51	2.95	3.43	3.99	4.7	5.99	7.59
d max	2.24	2.9	3.53	4.22	4.8	5.46	6.25	8	9.65
d mn	2.1	2.76	3.35	4.04	4.62	5.28	6.03	7.78	9.43